Dr. Cazares and Oasis of Hope Hospital in Mexico & Self-Pay Weight Loss Surgery Posted February 20 I am scheduled for MGB surgery with Dr. Cazares at Oasis of Hope Hospital in Tijuana on March 28th. This will be a revision from VSG in 2015. I am extremely nervous to say the least. Has anyone used the physician or facility and can provide some better insight. I don't want my nerves to talk me out of this, but want to know I'll be taken care of!